1. World Health Organization. The ICD-10 classification of mental and behavioral disorders. Geneva: World Health Organization; 1992.
2. Feighner JP, Robins E, Guze SB, Woodruff RA, Winokur G, Munoz R. Diagnostic criteria for use in psychiatric research. Arch Gen Psychiatry. 1972;26:57–63. [PubMed]
3. Valentin M, Ck Ey H, Bernard P, Brisset C. Manuel de Psychiatrie. 2nd ed. Paris: Masson; 1963. p. 245. (1886)
4. Wernicke C. Floor plan of psychiatry in clinical lectures. Thieme: Leipzig; 1894.
5. Kleist K. Iiber cykloide, paranoid and epileptoide psychosen and iiber the question of Degeneratious psychosen Switzerland. Arch Neurol Psychiatr. 1929;23:3–37.
6. Leonhard K. Cycloid psychoses- Endogenous psychoses which are neither schizophrenic nor manic-depressive. J Ment Sci. 1961;107:632–48. [PubMed]
7. Jaspers K. In: General psychopathology. Hhoenig J, Hamilton MW, editors. Manchester, UK: Manchester University Press; 1963.
8. Wimmer A. St.Hans Hospital, 1816-1916. Gad, Copenhagen: Jubilee Publication; 1916. Psykogene sindssygdomsformer (Psychogenic forms of mental disorders) pp. 82–216.
9. Faergeman P. Psychogenic psychoses: A description and follow-up of psychoses following psychological stress. London: Butterworth; 1963.
10. Stomgren E. Psychogenic psychoses. In: Hirsch SR, Shepherd M, editors. Themes and variations in European psychiatry. Bristol: Wright; 1974. pp. 97–117.
11. McCabe MS. Reactive psychosis: A clinical and genetic investigation: Monograph. Munksgaard, Copenhagen: Acta Psychiatr Scand (Suppl); 1975. p. 259.
12. Langfeldt G. The prognosis in schizophrenia and the factors influencing the course of the disease. Acta Psychiatr Neurol (Suppl); 1937. p. 13.
13. Kant O. Types and analysis of clinical pictures of recovered schizophrenics. Psychiatr Quart. 1940;14:676–94.
14. Vaillant GE. Prospective prediction of schizophrenic remission. Arch Gen Psychiatry. 1964;11:509–18. [PubMed] 15. Fowler RC, McCabe MS, Caderet RJ, Winokur G. The validity of good prognosis schizophrenia. Arch Gen Psychiatry. 1972;26:182–5. [PubMed] 16. Hollender MH, Hirsch SJ. Hysterical psychosis. Am J Psychiatry. 1964;120:1066–77. [PubMed]
17. Kasanin J. The acute schizoaffective psychoses. Am J Psychiatry. 1933;13:97–126.
18. Mitsuda H. The concept of atypical psychoses from aspects of clinical genetics. Acta Psychiatr Scand. 1965;41:372. [PubMed] 19. Carothers JC. A study of mental derangement in africans and an attempt to explain its peculiarities, more especially in relation to the african attitude to life. J Ment Sci. 1947;93:548–96. [PubMed]
20. Lambo TA. Schizophrenia and borderline states. In: De Reuck PVS Porter., editor. Transcultural psychiatry, Ciba Foundation Symposium. London: Chruchill; 1965.
21. Jilek WG, Jilek-Aall L. Transient psychosis in Africans. Psychiatr Clin. 1970;3:327–64.
22. Littlewood R, Lipsedge M. Paper presented at the Annual Meeting of the Royal College of psychiatrists. Summary in the Bulletin of the Royal College of Psychiatrists; 1977. Acute psychotic reactions in migrants.
23. Wig NN, Singh G. A proposed classification of psychiatric disorders for use in India. Indian J Psychiatry. 1967;9:158–71.
24. Wig NN, Narang RL. Hysterical psychosis. Indian J Psychiatry. 1969;11:93.
25. Kapur RL, Pandurangi AK. A comparative study of reactive psychosis and acute psychosis without precipitating stress. Br J Psychiatry. 1979;135:544. [PubMed] 26. Singh G, Sachdeva JS. Acute schizophrenic episodes: Are they schizophrenics? Indian J psychiatr. 1981;23:200–5. [PMC free article] [PubMed]
27. World Health Organization. Report of the International pilot study of schizophrenia. Geneva: WHO; 1973.
28. Sartorius N, Jablensky A, Korten A, Ernberg G, Anker M, Cooper JE, et al. Early manifestations and first-contact incidence of schizophrenia in different cultures: A preliminary report on the initial evaluation phase of the WHO Collaborative Study on determinants of outcome of severe mental disorders. Psychol Med. 1986;16:909–28. [PubMed]
29. Cooper JE, Jablensky A, Sarotrius N. WHO collaborative studies on acute psychoses using the SCAAP schedule. In: Stefanis CN, Rabavilas AD, Saldatos CR, editors. Psychiatry: A world perspective, Volume 1. Pub Elsevier; 1990. pp. 185–92.
30. Craddock N, Owen MJ. The beginning of the end for the Kraepelinian dichotomy. Br J Psychiatry. 2005;186:264–6. [PubMed] 31. Peralta V, Cuesta MJ. A dimensional and categorical architecture for the classification of psychotic disorders. World Psychiatry. 2007;6:36–7. [PubMed] 32. Kendler KS, McGuire M, Gruenberg AM, O'Hare A, Spellman M, Walsh D. The Roscomon Family Study, I: Methods, diagnosis of probands and risk of schizophrenia in relatives. Arch Gen Psychiatry. 1993;50:527–40. [PubMed] 33. Kendler KS, McGuire M, Guenberg AM, Spellman M, O'Hare A, Walsh D. The Roscommon family study II: The risk of nonschizophrenic non-affective psychoses in relatives. Arch Gen Psychiatry. 1993;50:645–52. [PubMed] 34. Kendler KS, Karkowski LM, Walsch D. The structure of psychosis: Latent class analsis of probands from the Roscommon family study. Arch Gen Psychiatry. 1998;55:492–9. [PubMed]
35. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 3rd ed. Washington, DC: American Psychiatric Association; 1987.
36. Fogelson DL, Cohen BM, Pope HG., Jr A study of DSM III schizophreniform disorder. Am J Psychiatry. 1982;139:1281–5. [PubMed]
37. Taylor MA. Schizo-affective and allied disorders. In: Post RM, Ballenger JC, editors. The Neurobiology of Manic-Depressive Illness. Baltimore: Williams and Wilkins; 1984.
38. Makanjuola RO, Adedapo SA. The DSM-III concepts of schizophrenic disorders and schizophreniform disorder. Br J Psychiatry. 1987;151:611–8. [PubMed] 39. Coryell W, Tsuang MT. DSM-III schizohreniform disorder:comparison with schizophrenia and affective disorder. Arch Gen Psychiatry. 1982;39:66–9. [PubMed] 40. Beiser M, Fleming JAE, Iacono WG, Lin T. Redefining the diagnosis of schizophreniform disorder. Am J Psychiatry. 1988;145:695–700. [PubMed]
41. Kraepelin E. The manifestations of deception being: Zeitschrift fur Total Neurologia and Psychiatry (1920) In: Hirs SR, Shepered M, editors. Themes and Variations in European Psychiatry. Bristol, England: J Wright; 1974.
42. Kendell RE, Gourlay J. The clinical distinction between Psychotic and Neurotic depressions. Br J Psychiatry. 1970;117:257–60. [PubMed] 43. Kendell RE, Gourlay J. The clinical distinction between affective psychoses and schizophrenia. Br J Psychiatry. 1970;117:261–6. [PubMed] 44. Kendell RE, Brockington IF. The identification of disease entities and the relationship between schizophrenic and affective psychoses. Br J psychiatry. 1980;137:324–31. [PubMed] 45. Brockington IF, Hillier VF, Walker J. The distinction between the affective psychoses and schizophrenia. Br J Psychiatry. 1979;135:243–8. [PubMed] 46. Tsuang MT, Woolson RF, Winokur G, Crowe RR. Stability of psychiatric diagnosis: Schizophrenia and affective disorders followed up over a 30 to 40 year period. Arch Gen Psychiatry. 1981;38:535–9. [PubMed]
47. Rudin E. To inheritance and Neuentslehung of Dementia Praecox. Springer: Berlin; 1916.
48. Powell A, Thomson N, Hall DJ, Wilson L. Parent-child concordance with respect to sex and diagnosis in schizophrenia and manic-depressive psychosis. Br J psychiatry. 1973;123:653–8. [PubMed] 49. Abrams R, Taylor MA. The genetics of schizophrenia: A reassessment using modern research criteria. Am J Psychiatry. 1983;140:171–5. [PubMed] 50. Frangos E, Athanassenas G, Tsitourides S, Katsanou N, Alexandrakou P. Prevalence of DSM-III schizophrenia among first degree relatives of schizophrenic probands. Acta Psychiatr Scand. 1985;72:382–6. [PubMed] 51. Baron M, Gruen R, Kane J, Asnis L. Modern research criteria and the genetics of schizophrenia. Am J Psychiatry. 1985;142:697–701. [PubMed] 52. Angst J, Frey R, Lohmeyer B, Zerbin-Rudin E. Bipolar manic depressive psychoses: Results of a genetic investigation. Hum Genet. 1980;55:237–54. [PubMed] 53. Scharfetter C, Nusperli M. The group of schizophrenias, schizoaffective disorders and affective disorders. Schizophr Bull. 1980;6:586–91. [PubMed] 54. Tsuang MT, Winokur G, Vrowe RR. Morbid risks of schizophrenia and affective disorders among first-degree relatives of patients with schizophrenia, mania, depression and surgical conditions. Br J Psychiatry. 1980;137:497–504. [PubMed] 55. Tsuang MT, Kendler KK, Gruenberg AM. DSM-III schizophrenia: Is there evidence for familial transmission? Acta Psychiatr Scand. 1985;71:77–83. [PubMed] 56. Gershon ES, Delisi LE, Hamovit J, Maxwell E, Hamovit J, Guroff J. A controlled family study of chronic psychoses: Schizophrenia and schizo-affective disorder. Arch Gen Psychiatry. 1988;45:328–36. [PubMed]
57. Marneros A, Akiskal H. The overlap of affective and schizophrenic spectra. Cambridge: Cambridge University Press; 2007.
58. Craddock N, O'Donovan MC, Owen MJ. Genes for schizophrenia and bipolar disorder? Implications for psychiatric nosology. Schizophr Bull. 2006;32:9–16. [PMC free article] [PubMed] 59. Slater E, Shields J. Psychotic and neurotic illnesses in twins: Medical Research Council Special Report 278. London: Her Majesty's Stationery Office; 1953. [PubMed]
60. Rosenthal D, Kety SS, editors. The transmission of schizophrenia. Oxford: Pergamon Press; 1968.
61. Farmer AE, McGuffin P, Gottesman II. Twin concordance for DSM-III schizophrenia: Scrutinizing the validity of the definition. Arch Gen Psychiatry. 1987;44:634–41. [PubMed] 62. Winokur G. Psychosis in bipolar and unipolar affective illness with special reference to schizoaffective disorder. Br J Psychiatry. 1984;145:236–42. [PubMed] 63. Crow TJ. Nature of the genetic contribution to psychotic illness: A continuum view point. Acta Psychiatr Scand. 1990;81:401–8. [PubMed] 64. Maier W. Do schizoaffective disorders exist at all? Acta Psychiatr Scand. 2006;113:369–71. [PubMed] 65. Das SK, Malhotra S, Basu D. Family study of acute and transient psychotic disorders: Comparison with schizophrenia. Soc Psy Psychiatr Epidem. 1999;34:328–32. [PubMed]
66. Astrup C, Fossum A, Holmboe R. Prognosis in functional psychoses: Clinical and social and genetic aspects. Springfield: CC Thomas; 1962.
67. Perris, C A study of cycloid psychosis. Acta Psychiatr Scand. 1974;253:7–77. [PubMed] 68. Das SK, Malhotra S, Basu D. Testing the stress- vulnerability hypothesis in ICD-10-diagnosed acute and transient psychotic disorders. Acta Psychiatr Scand. 2001;104:56–8. [PubMed] 69. Varma VK, Malhotra S, Jiloha RC. Acute non-organic psychotic states in India: Symptomatology. Indian J Psychiatry. 1992;34:89–101. [PMC free article] [PubMed]
70. Malhotra S, Varma VK, Malhotra A. Classification of acute non organic psychotic states in India. Int J Mental Health. 1992-93;21:6–32.
71. Indian Council of medical Research. Final report of phenomenology and natural history of acute psychosis. New Delhi: ICMR; 1985.
72. Susser E, Wanderling J. Epidemiology of non-affective acute remitting psychosis: Sex and socio-cultural setting. Arch Gen Psychiatry. 1994;51:294–301. [PubMed] 73. Susser E, Varma VK, Malhotra S, Conover S, Amador XF. Delineation of acute and transient psychotic disorders in a developing country setting. Br J Psychiatry. 1995;;167:216–9. [PubMed] 74. Susser E, Fennig S, Jandorf L, Amador X, Bromet E. Epidemiology, diagnosis and course of brief psychoses. Am J Psychiatry. 1995b;152:1743–8. [PubMed] 75. Susser E, Varma VK, Mattoo SK, Finnerty M, Mojtabai R, Tripathi BM, et al. Long-term course of acute brief psychosis in a developing country setting. Br J Psychiatry. 1998;173:226–30. [PubMed] 76. Mojtabai R, Varma VK, Susser E. Duration of remitting psychoses with acute onset: Implications for ICD-10. Br J Psychiatry. 2000;176:576–80. [PubMed]
77. Rozario A, Malhotra S, Basu D. Acute and Transient Psychotic disorders: A follow-up study. PGIMER, Chandigarh: Unpublished MD thesis; 1999.
78. Malhotra S. Twenty year follow up of WHO CAP study cohort. 2000. Unpublished.
79. Jorgensen A. Long term course of acute reactive paranoid psychosis. Acta Psychiatr Scand. 1995;71:30–7. [PubMed] 80. Jorgensen P, Bennedsen B, Christensen J, Hyllested A. Acute and transient psychotic disorder: A one-year follow up study. Acta Psychiatr Scand. 1997;96:150–4. [PubMed]
81. Malhotra S, Gupta N, Gill S. Recurrence in acute and transient psychosis: Paper presented at the 13th World Congress of Psychiatry. Cairo, Egypt: Sept. 10-15.
82. Malhotra S, Varma VK, Misra AK, Das S, Wig NN, Santosh PJ. Onset of acute psychotic states in India: A study of sociodemographic, seasonal and biological factors. Acta Psychiatr Scand. 1998;97:125–31. [PubMed] 83. Pillmann F, Haring A, Balzuweit S, Bloink R, Marneros A. The concordance of ICD-10 acute and transient psychosis and DSM-IV brief psychotic disorders. Psychol Med. 2002;32:525–33. [PubMed]
84. Malhotra S, Malhotra S. Acute and transient psychosis: Conceptual understanding and current status. In: Murthy RS, editor. Mental Health in India 1950-2000. Bangalore: PAMH; 2001. pp. 17–41.
85. Collins PY, Varma VK, Wig NN, Mojtabai R, Day R, Susser E. Fever and acute brief psychosis in urban and rural settings in north India. Br J Psychiatry. 1999;174:520–4. [PubMed] 86. El-Rufaie OE. Acute schizophrenic episode:is it culture-related syndrome? Acta Psychiatr Scand. 1986;73:263–5. [PubMed] 87. Fisch RZ. Psychosis precipitated by marriage: A culture-bound syndrome? Br J Psychiatry. 1992;65:385–91. [PubMed] 88. Frasca J, Kilpatrick TJ, Burns RJ. Protracted form of encephalitis with good outcome. Med J Aust. 1993;158:629–30. [PubMed] 89. Jarvis WR, Wasserman AL, Fodd RD. Acute psychosis in a patient with Epstein-Barr virus infection. J Am Acad Child Adolesce Psychiatry. 1990;29:468–9. [PubMed] 90. Klein RF, Betts R, Hom R, Sullivan JL. Acute psychosis in a 45-year old man with bipolar disorder and primary Epstein-Barr virus infection: A case report. Genl Hosp Psychiatry. 1984;6:13–5. [PubMed] 91. Srikanth S, Ravi V, Poornima K, Shetty KT, Gangadhar BN, Janakiramaiah N. Viral antibodies in recent-onset, non-organic psychoses, correspondence with sympathetic severity. Biol Psychiatry. 1994;36:517–21. [PubMed] 92. Lewis G, David A, Andreasson S, Allebeck P. Schizophrenia and city life. Lancet. 1992;340:137–40. [PubMed] 93. Mortensen PB, Pedersen CB, Westergaard T, Wohlfahrt J, Ewald H, Mors O, et al. Effects of family history and place and season of birth on the risk of schizophrenia. N Engl J Med. 1999;340:603–8. [PubMed] 94. Marcelis M, Takei N, Van Os J. Urbanization and risk for schizophrenia: Does the effect operate before or around the time of illness onset? Psychol Med. 1999;29:1197–203. [PubMed] 95. Mednick SA, Machon RA, Huttnen MD, Bonett D. Adult schizophrenia following prenatal exposure to an influenza epidemic Arch Gen Psychiatry. 1988;45:189–92. [PubMed] 96. Andreasson S, Engstrom A, Allebeck P, Rydberg U. Cannabis and schizophrenia: A longitudinal study of Swedish conscripts. Lancet. 1987;2:1483–6. [PubMed] 97. Lyon M, Barr CE, Cannon TD, Mednick SA, Shore D. Fetal neural development and schizophrenia. Schizophr Bull. 1989;15:149–60. [PubMed]
98. McNeil TF. Obstetric factors and perinatal injuries. In: Tsuang MT, Simpson JC, editors. Handbook of Schizophrenia, vol 3 Nosology, Epidemiology and Genetics. New York: Elsevier; 1988.
99. Wilcox JA, Nasrallah HA. Childhood head trauma and psychosis. Psychiatr Res. 1982;21:303–6. [PubMed]
100. Bleuler E. The undisciplined thinking in medicine and overcoming. Springer: Berlin; 1919.
101. Lewis SW. Congenital risk factors for schizophrenia. Psychol Med. 1989;19:5–13. [PubMed] 102. Angst J, Scharfetter C, Stassen HH. Classification of schizoaffective patients by multidimensional scaling and cluster analysis. Psychiatr Vlin. 1983;16:254–64. [PubMed] 103. Gershon ES, Hamovit J, Guroff JJ, Dibble E, Leckman JF, Sceery W, et al. A family study of schizoaffective, bipolar I, bipolar II, unipolar and normal control patients. Arch Gen Psychiatry. 1982;39:1157–67. [PubMed] 104. Cardno AG, Rijsdijk FV, Sham Pak C, McGuffin P. A twin study of genetic relationships between psychotic symptoms. Am J Psychiaty. 2002;159:539–45. [PubMed]
105. Gooding DC, Iacono WG. Schizophrenia through the lens of a developmental psychopathology perspective. In: Cicchetti D, Cohen D, editors. Developmental psychopathology- Vol 2 Risk, disorder and adaptation. New York: John Wiley and Sons; 1995. pp. 535–80.
106. Peralta V, Cuesta MJ, Giraldo C, Cardenas A, Gonzalez F. Classifying psychotic disorders: Issues regarding categorical vs dimensional approaches and time frame to assess symptoms. Eur Arch Psychiatr Clin Neurosce. 2002;252:12–8. [PubMed] 107. Van Os J, Gilvarry C, Bale R, Van Horn E, Tattan T, White I, et al. A comparison of the utility of dimensional and categorical representations of psychosis. Psychol Med. 1999;29:595–606. [PubMed] 108. Brockington I. Rethinking psychosis. World Psychiatry. 2007;6:31–2. [PubMed]